ipv6 and packet tracer
DESCRIPTION
IPv6 and Packet Tracer. Jim Bergquist [email protected] Lakes Country Service Cooperative Karen Alderson [email protected] Networking Academy Technical Advocacy. Purpose of This Session. Scope of this session - PowerPoint PPT PresentationTRANSCRIPT
© 2009 Cisco Systems, Inc. All rights reserved. Cisco PublicIPv6 & Packet Tracer 1
IPv6 and Packet Tracer
Jim Bergquist [email protected] Lakes Country Service Cooperative
Karen Alderson [email protected] Academy Technical Advocacy
IPv6 & Packet Tracer 2© 2009 Cisco Systems, Inc. All rights reserved. Cisco Public
Purpose of This Session
Scope of this session Topics sufficient to give students and instructors a basic
knowledge of how IPv6 works Demos, with Packet Tracer files and lab activities Links to resources that cover more IPv6 topics
To provide a working knowledge to instructors and students for building and troubleshooting simple IPv6 networks
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Visualizing the IPv6 Address Space
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Earth drawing credit: http://flickr.com/photos/ontdesign/http://search.creativecommons.org/
Visualizing the IPv6 Address Space
Assign one IPv6 address per grain of sand
How many grains of sand would be needed to use all IPv6 addresses?
Fill Earth-sized containers with the sand
128 bit addresses2 128 is a very large number
Fill here
HollowEarth-sizedcontainer
IPv6 address2009:1:3:4EFF:2C:16BA:3D:B012/112
SandGrain
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Visualizing the IPv6 Address SpaceThe Earth-sized containers would make 20 circles around the outer orbit of our solar system (Pluto)
Our Solar System
Blue dots are Earth-
sized containers
Based on image from public image gallery at
http://www.eso.org/
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IPv6 Address Format and Types of Addresses
More information is available in the referenced resources
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What IPv6 Addresses Look Like
128 bits are separated into eight blocks of 16 bits Each 16-bit block is represented in hex and delimited
with colons:2001:00D3:0000:2F00:02AA:00FF:FE28:9C5A
In each 16-bit block, leading zeros may be removed:2001:00D3:0000:2F00:02AA:00FF:FE28:9C5A2001:D3:0:2F00:2AA:FF:FE28:9C5A
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Zero Compression (or Shortform)
Consecutive 16-bit blocks of zeroes can be replaced with a double-colon (::)
FE80:0:0:0:2AA:FF:FE9A:4CA2 can be compressed to FE80::2AA:FF:FE9A:4CA2
The multicast address FF02:0:0:0:0:0:0:2 can be compressed to FF02::2
Zero compression can only be used once in a given address
Otherwise, you could not determine the number of 0 bits represented by each double-colon instance
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Teaching Tip
If students have trouble seeing why only one double colon is allowed, give them an example of what would happen if you allowed it. The following two addresses could both be shortened to the third address, so there would be ambiguity
2001:0:0:0:355:0:0:72001:0:0:355:0:0:0:72001::355::7 NOT ALLOWED
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IPv6 Address Prefix Length
An address prefix is indicated by the prefix length following a “/” at the end of the address.
Example: 2001:DB8:0:2F00:2AA:FF:FE28:9C5A/64
The prefix length (number of upper bits) is 64 This means the lower 64 bits are used for hosts It is used the same way as CIDR in IPv4 Subnet masks are not used in IPv6
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Teaching Tips
To remove the mystery from numbers like B and D3A To see why 32 hex digits represents 128 binary bits To understand where the network and host portion are,
using a classless designation, “/” To understand how stateless autoconfiguration is done
Why emphasize hexadecimal and hex-to-binary conversion?
Fortunately, hex-to-binary conversion is easy
Consider having students memorize the binary equivalent of the 16 hex digits
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Fun Teaching Facts The Internet Assigned Numbers Authority (IANA) will
allocate from 2001::/16 for the time beinghttp://www.zytrax.com/tech/protocols/ipv6.html#global
Addresses within 2001:db8::/32 are non-routable and should be used in examples given in documentation for networking scenarios or tutorials
http://en.wikipedia.org/wiki/IPv6
Windows 7 Server, when it is released, will have powerful VPN capabilities. IPv6 needs to be deployed
http://www.computerworld.com/action/article.do?command=viewArticleBasic&articleId=9118322
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Types of IPv6 Addresses
Unicast (one to one) Multicast (one to many) Anycast (one to “nearest,” according to a metric) No broadcasts in IPv6
Unicast addresses will be used in this sessionSee additional resources for other definitions
See a description of address types
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Unicast IPv6 AddressesDifferentiated by their scope, as follows: Link-local addresses—only on single link, not routed
FE80 prefix
Unique-local addresses—routed only within private network
FC00 prefix
Global unicast addresses—globally routable2001 prefix currently being issuedGlobal addresses use a 64 bit host portion
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IPv6 Address Assignment
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IPv6 Address Assignment
Manually (static) Stateless auto-configuration IPv6 dhcp (Stateful autoconfiguration) Link-local addresses are configured automatically
No arp in IPv6. It is replaced by Neighbor Discovery (ND)
Addresses can be assigned in these ways
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IPv6 Stateless Autoconfiguration
1. Host automatically configures its own link-local address
2. With link-local address, a host discovers connected routers to obtain a global prefix
3. A host then builds its own global unicast address
See the provided Activity:Build an IPv6 EUI-64 address.doc
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Stateless AutoconfigurationDHCPv6 is not required
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Router(config)#ipv6 unicast-routingRouter(config)#int fa0/1Router(config-if)#ipv6 addr 2001:db8::/64 eui-64Router(config-if)#ipv6 enableRouter(config-if)#no shut
Stateless AutoconfigurationOnly the network part of the address is suppliedin the ipv6 address command
Because 2001:db8:: ends with “::”, it is not an address. The rest of the address is supplied by the eui-64 process.eui stands for “extended unique identifier”
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Stateless AutoconfigurationRouter’s fa0/1 interface generates its link-local address and global unicast address
Router#sho ipv6 int briFastEthernet0/0 [administratively down/down]FastEthernet0/1 [up/up] FE80::201:42FF:FE44:3C02 2001:DB8::201:42FF:FE44:3C02
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Stateless Autoconfiguration
On PC’s Config tab, go to Global Settings and select Auto Config button to acquire Gateway address. Note: It is the link-local address of the router’s fa0/1 (It begins with FE80)
Packet Tracer PCs support this
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Stateless Autoconfiguration
Select FastEthernet to check if it is set to Auto Config, and has its link-local address and an EUI address.
Packet Tracer PC
Packet Tracer PC line command to obtain both interface and default gateway addresses:PC> ipv6config autoconfig
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Commands for Students to Compare
show ip interface brief show ipv6 interface briefshow ip route show ipv6 routeshow ip protocols show ipv6 protocols
Differences in RIP and IPv6 RIP (RIPng)(see example in this presentation)
Differences in OSPF and IPv6 OSPF (OSPFv3)(see example in this presentation)
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Ping Command for IPv6
In Cisco routers, it is ping In Packet Tracer routers, it is ping In Packet Tracer PCs, it is ping In Windows XP, it is ping6
Note: • With PT PCs, if you type an IPv6 address incorrectly, for
example with a semicolon, ping will become unresponsive
• Windows XP will report “Host not found”
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Packet Tracer ipv6config CommandUsed in Packet Tracer PCs. Similar to ipconfig
In Windows XP:C:\ ipv6 install install the protocol stackC:\ ipconfig display IPv4 and IPv6 addresses
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Demo: IPv6 RIP(RIPng)
RIPng (“Next Generation”) is a name used to describe IPv6 RIP
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Connectivity Using IPv6 RIPStatic addresses are used between routers.Stateless autoconfiguration is used for hosts.
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Global Commands
ipv6 unicast-routing (enable IPv6)
ipv6 router rip CIRCUS (define a process called CIRCUS)
Configure IPv6 RIP on each router
Note: The global commandipv6 router rip CIRCUSwill be automatically configured by the router when IPv6 RIP is configured on an interface (next slide)
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Interface Commands- Static Address
ipv6 enableipv6 addr FC00:2::1/112ipv6 rip CIRCUS enableno shut
Note: The IPv4 RIP global network command is not used with IPv6 RIP
Configure interconnecting interfaces on the two routers(example, on fa0/0 of Router1)
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Interface Commands- Auto Config
ipv6 enableipv6 addr FC00:3::/64 eui-64ipv6 rip CIRCUS enableno shut
Note: Ensure that the PCs are set for Auto Config in the Config Tab
Note: The process name CIRCUS is user-defined and is local to the router. You can use a different process name on a neighboring router
Configure the router LAN interfaces and the PCs with Auto Config (example, on fa0/1 of Router1)
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Ping from PC1 to PC0
Note: The colon, “:” following the address is merely part of the ping output
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Demo or Lab: IPv6 OSPF(OSPFv3)
Packet Tracer files and labs are included with the conference materials
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Configuring OSPF for IPv6Based on CCNP- BSI Lab 8-1
PingHere
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Enable IPv6 Routing
R2(config)#ipv6 unicast-routing
A global command
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Configure Loopback Addresses
R1(config)# interface loopback0 R1(config-if)# ip address 10.1.1.1 255.255.255.0
R1(config-if)# ipv6 address FC00::1:1/112
Needed for OSPFv3
Note: Both IPv4 and IPv6 addresses are needed on the Loopback interfaces
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Configure Serial Addresses
R1(config)# interface serial0/0/0 R1(config-if)# ipv6 address FC00::12:1/112 R1(config-if)# clockrate 64000 R1(config-if)# no shutdown
Use static addressing
Note: The ipv6 enable command is unnecessary if you configure an address on an interface
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Configure EUI addresses
R2(config)# interface fastethernet0/0 R2(config-if)# ipv6 address FC00:23::/64 eui-64 R2(config-if)# no shutdown
Configure the router FastEthernet interfaces
Note: Stateless Autoconfiguration works between two routers or between a router and a host
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Enable OSPFv3
R2(config)#interface loopback0 R2(config-if)#ipv6 ospf 1 area 0 R2(config-if)#interface serial0/0/0 R2(config-if)#ipv6 ospf 1 area 0 R2(config-if)#interface fastethernet0/0 R2(config-if)#ipv6 ospf 1 area 0
Enable on all interfaces, including Loopback
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Verify the Configuration
From host PC0PC>ping FC00::12:1
From router R1R1#show ipv6 ospf neighbor R1#show ipv6 route R1#show ipv6 ospf interface R1#show ipv6 protocolR1#show ipv6 ospf database R1#show run
Use these commands to verify the configuration and to examine tables
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ICMPv6 Packet Type Numbers
You can look at packet details with Packet Tracer
Also see included Activity:
Comparing ICMPv4 and ICMPv6 Packet Type numbers.doc
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Some ICMPv6 Type Numbers
Router Advertisement(Neighbor Discovery)- 134
Specific to IPv6Sent periodically to neighbors
v6 Echo Request (ping)- 128Compare with v4: Type 8
v6 Echo Reply (ping)- 129Compare with v4: Type 0
Activity: Use Packet Tracer in Simulation modeClick a packet to see type number
Type 134
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Broken Network Example
Let’s fix it!
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This Network has a Problem
Uses IPv6 RIP
Static IPv6 addresses between routers
Stateless autoconfiguration for hosts
What IPv6 address is assigned to each PC?
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This Network has a Problem
A. sho ipv6 protocol on Routers 1 and 2
B. sho ipv6 route on Routers 1 and 2
C. sho ipv6 int brief on Routers 1 and 2
D. ping from PC1 to PC0 inSimulation mode
Problem is in Router1 or Router2
What do you think we should do first?
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This Network has a Problem
What should we do next?
A. sho run on Routers 1 and 2
B. sho ipv6 route on Routers 1 and 2
C. sho ipv6 int brief on Routers 1 and 2
D. sho ipv6 rip database on Routers 1 and 2
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This Network has a Problem
Which of these is the problem?
A. Missing RIP enable command on an interface
B. Missing IPv6 address on a serial interface
C. ipv6 rip is not enabled globally on a router
D. Clock not set on a serial DCE interface
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Another Broken Network Example
Let’s fix this one, too!
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This Network has a ProblemProblem is in Router0 or Router1
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This Network has a Problem
A. sho ipv6 protocol on Routers 0 and 1
B. sho ipv6 route on Routers 0 and 1
C. sho ipv6 int brief on Routers 0 and 1
D. ping from PC1 to PC0 in Simulation mode
What should we do first?
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This Network has a ProblemWhat should we do next?
A. sho run on Routers 0 and 1
B. sho ipv6 route on Routers 0 and 1
C. sho ipv6 int brief on Routers 0 and 1
D. sho ipv6 rip database on Routers 0 and 1
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This Network has a ProblemWhich of these is the problem?
A. Missing ipv6 rip CIRCUS enable command on an interface
B. Missing IPv6 address on an interface
C. ipv6 rip is not enabled globally on a router
D. Interface is shut down
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Now You Can Configure a Network
Use your knowledge to create a working network
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Configure this Network in Packet Tracer Routers and hosts need to be configured Use the suggested networks, and IPv6 RIP
DCE
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What You Can Do To Help
Contribute your work
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Share Your Packet Tracer Files and Activities Login to http://cisco.netacad.net >> Instructor Home
Page >> Forums and Chat In Instructor Community, click Packet Tracer If you have a Packet Tracer file (.pkt), click Discuss
Best PracticesBest Practices for teaching and using PT in the classroom
If you have a Packet Tracer Activity (.pka), click Activity WizardAuthor and share activities within your postings
Add a Discussion, describe your Packet Tracer file or Activity and attach it
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Communicating Between IPv4 and IPv6
One example of several technologies
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1 Scott Hogg , Network World , 09/05/2007http://www.networkworld.com/news/tech/2007/090507-tech-uodate.html
Communicating Between ProtocolsStudents will ask “Can you communicate between IPv4 and IPv6 networks?”
Dual Stack (dual OSI stack)“Dual stack where you can; tunnel where you must.” 1
TunnelingSee CCNP- BSI, Labs 8.2 and 8.3
Note: PT Routers do not have the tunnel command
Address TranslationAddress translation may not become widely used1
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Dual Stack Example
Dual stack means configuring IPv4 and IPv6 on at least one router interface
No special router commands neededWorks on any router that supports IPv6
Main tasks:Configure IPv4 and/or IPv6 addresseson appropriate interfaces
Enable RIP and IPv6 RIP routing protocols (or OSPF and OSPFv3)Note: The routing tables are separate
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Dual StackExampleIPv4 host can ping IPv4 host
IPv6 host can ping IPv6 host
Dual stack implemented
here
IPv4 and IPv6 host
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IPv4 Routing Table, Router0
Router0#sho ip route
<output omitted>
Gateway of last resort is not set
C 192.168.0.0/24 is directly connected, FastEthernet0/0
R 192.168.1.0/24 [120/1] via 192.168.2.1, 00:00:19, FastEthernet0/1
C 192.168.2.0/24 is directly connected, FastEthernet0/1
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IPv6 Routing Table, Router0Router0#sho ipv6 routeIPv6 Routing Table - 6 entries
D - EIGRP, EX - EIGRP externalR 2009:1:1::/64 [120/1] via FE80::230:F2FF:FE0D:A6CE, Serial0/0/0C 2009:1:3::/64 [0/0] via ::, FastEthernet0/1L 2009:1:3:0:20A:41FF:FE5C:E602/128 [0/0] via ::, FastEthernet0/1C FC00:2::/112 [0/0] via ::, Serial0/0/0L FC00:2::2/128 [0/0] via ::, Serial0/0/0L FF00::/8 [0/0] via ::, Null0
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Ping from PC0 to the IPv4 PC (PC1)
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Ping from PC0 to the IPv6 PC (PC2)
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Q and A
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List of Activities and Provided Worksheets
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List of Included Activities
Stateless AutoconfigurationStateless Autoconfig.pktBuild an IPv6 EUI-64 Address.doc (A separate activity)
IPv6 RIPIPv6 RIP.pkt
IPv6 OSPFIPv6 OSPF CCNP Lab 8-1.pkt
Comparing ICMPv4 and ICMPv6 PacketsComparing ICMPv4 and ICMPv6 Packet types.docComparing ICMPv4 and ICMPv6 Packet types_ANSWERS.docICMPv4 ICMPv6 packets.pkt
Packet Tracer files accompany most Activities
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List of Included Activities
Broken Networks3 Router-IPv6 RIP-broken1.pktIPv6 RIP-broken2.pkt
Unconfigured NetworkUnconfigured.pkt (Configured.pkt included for reference)
Dual StackDual stack-both IPv6 and IPv4.pkt
Upgrade IOS for PT 2620XM to support IPv6Upgrading IOS of Packet Tracer 2620XM router.docUpgrading IOS of Packet Tracer 2620XM router_ANSWERS.docNo pkt file
Packet Tracer files accompany most Activities
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Links to Additional Information
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Topics Covered in Other Resources
Why IPv6, and why not NAT? Time frame for implementation Details of the parts of the address Special addresses Type and scope of addresses Details of packet header
See the links to resources and additional information
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Topics Covered in Other Resources
Neighbor discovery IPv6 ACLs Security with IPv6 Mobility with IPv6 IPv4 to IPv6 migration: dual stack, tunneling, translation Current deployment status of IPv6 Some IPv6 sites on internet
See the links to resources and additional information
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Additional Information
Deploying IPv6 Networks, Ciprian Popoviciu, Eric Levy-Abegnoli, Patrick Grosstete, Cisco Press (go to)
Guide to IPv6 concepts, service implementation, and interoperability
Cisco Self-Study: Implementing Cisco IPv6 Networks, Regis Desmeules, Cisco Press (go to)
Design, build, configure, and support IPv6 networks
Configuring IPv6 for Cisco IOS, Sam Brown, Eric Knipp, et al, Callisma (go to)
Everything you need to monitor and troubleshoot IPv6 networks
Books and Google Books
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Additional Information
Running IPv6, Iljitsch van Beijnum (go to)How to install and operate IPv6 for Windows, Linux, Mac OS
IPv6: Theory, Protocol and Practice, Peter Loshin (go to)Guide to implementation and deployment of IPv6
IPv6 Advanced Protocols Implementation, Qing Li, Tatuya Jinmei, Keiichi Shima (go to)Advanced IPv6 implementation of routing, multicasting, DHCPv6, DNS, security, mobility
Books and Google Books
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Additional Information
Introduction to IPv6 – Why IPv6? (go to)Overview and In-depth sections
Introduction to IPv6 (go to)Technology information, Design and Configuration Guides
Cisco IOS IPv6 Command Reference (go to)Excellent source for learning and troubleshooting
Cisco IPv6 Quick Start Trial (go to)A how-to, using equipment
List of RFCs for IPv6 (go to)Useful for understanding Cisco IPv6 implementations
IPv6 documentation at cisco.com
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Additional Information
Cisco IOS IPv6 Configuration Library (go to)Guides for implementing many IPv6 functions and protocols
IPv6 Tunneling (go to)Describes many different tunneling protocols
Tunneling IPv6 through an IPv4 Network (go to)Five-router example with configurations
ICMPv6 Packet Types and Codes – TechNote (go to)All of the types and codes for ICMPv6 packets
IPv6 documentation at cisco.com
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Additional Information
“IPv6” (go to)General IPv6 information, FAQ, links
go6, (“The IPv6 portal”) (go to)Upcoming events, blog, wiki, newsletter, member area
IPv6 Task Force (“The IPv6 Portal”) (go to)Introduction, news, pressroom, RSS, IPv6 Guide, and Portal
The IPv6 Forum (go to)Events, news, book recommendations, government news, competitions, and an “IPv4 Exhaustion Counter”!
Portals, Forums, information sites
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Additional Information
IETF RFC repository (go to)Find an RFC if you know its number
networksorcery.com list of IPv6 RFCs (go to)Excellent searchable list, including obsoleted RFCs
Microsoft IPv6 implementation (go to)RFCs used to implement IPv6 in Windows 2003 Server and XP
RFC 2460 IPv6 Specification (1998) RFC 4291- IPv6 Addressing Architecture (2006) RFC 2462- IPv6 Stateless Autoconfiguration (1998)
Useful RFCs and lists
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Additional Information
IPv6 Deployment Guide (go to)Detailed and indexed, 14 chapters
IPv6 Concepts from Cisco Networkers 2006 (go to)Still useful information
IPv6-Intro.ppt and IPv6-Using_in_the_Network.pptIncluding Lesson Plans for each. At Academy Connection, click File Sharing, use keyword ipv6
Online resources
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Additional Information and a Thank You
IPv6 cheat sheet (go to)Address ranges, ICMPv6 type numbers, header structure, more
Technical Facts at European IPv6 Task Force (go to)Brief summary of key information. See RFC2460 for full specs.
A big “thank you” to Dallas Shiroma, manager of Emerging Technologies, Pacific Center for Advanced Technology Training, Honolulu, HI, for permission to use of some slides in this session
Online resources
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FAQ Area
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Where is IPv6 covered in Exploration?
Network Fundamentals6.3.6
Routing Protocols and Concepts1.1.3, 3.1.1, 5.1.1, 10.2.3, 11.1.1, 11.7.1
LAN Switching and Wirelessno coverage
Accessing the WAN7.0.1, 7.3, 7.5.1
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Where is IPv6 covered in Discovery?
Networking for Home and Small BusinessesNo coverage
Working at a Small-to-Medium Business or ISP4.1.6
Introducing Routing and Switching in the Enterprise5.2.1
Designing and Supporting Computer Networks6.3
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What are the IPv6 Goal Areas in the CCNA Certification Exam?
Use the Cisco Learning Network (go to) Find CCNA Exam Topics (login required). IPv6 topics are:
Describe the technological requirements for running IPv6 in conjunction with IPv4 (including: protocols, dual stack, tunneling, etc)
Describe IPv6 addresses
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Where is IPv6 covered in CCNP?
CCNP: Building Scalable Internetworks Module 8: IPv6
8.1 Explaining IPv68.2 IPv6 Addressing8.3 Dynamic IPv6 Addresses8.4 IPv6 Routing8.5 Implementing and Verifying OSPFv38.6 Using IPv6 and IPv48.7 IPv6 Challenge Labs
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What are the IPv6 Goal Areas in the CCNP Certification Exams? Use the Cisco Learning Network (go to) Find CCNP Exam Topics (login required). IPv6 topics are: BSCI Exam:
Describe IPv6 addressing operationsDescribe IPv6 interoperation with IPv4Describe, configure or verify OSPF routing with IPv6 addressing
BCMSN Exam: None explicitly listed ISCW Exam: None explicitly listed ONT Exam: None explicitly listed
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How can I keep all the IPv6 addressing rules straight? Hosts should have globally routable addresses created
with stateless autoconfigurationUse 2001 prefixUse /64 eui-64 to create them
Serial links between routers should not use globally routable addresses
Use FC00 prefix and static addressingUse a prefix length /64However, the prefix length could also be, for example, /112
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More about Stateless Autoconfiguration: eui-64 process Cisco uses the EUI-64 process to perform
stateless auto-configuration EUI stands for “extended unique identifier” This process expands the 48 bit MAC address to 64 bits
by inserting FFFE (16 bits) If the chosen address is from a unique Ethernet MAC
address, the universal / local (“u” bit) is set to 1 for global scope
Other interfaces, such as serial (no MAC address), use a different method to build the address and have the u bit set to 0 for local scope
See http://www.isi.edu/in-notes/rfc2374.txt and http://www.faqs.org/rfcs/rfc2373.html
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More about Stateless Autoconfiguration: IPv6 Interface IdentifierUses MAC Address
00 90 27 FF FE 17 FC 0F
FF FE
00 90 27 17 FC 0F
00 90 27 17 FC 0F
000000U0 Where U=1 = Unique0 = Not Unique
02 90 27 FF FE 17 FC 0F
U = 1
48 bit MAC Address
64 bits become part of IPv6 address
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What is subnetting like in IPv6?
Sixteen subnet bits, from /49 to /64 are given to a site
With the 16 subnet bits, a company can have 65,535 LANs
A similar concept, but many bits available
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Does BGP Support IPv6?
The current version of BGP is BGP4 BGP4 does support IPv6 See http://tools.ietf.org/html/draft-ietf-idr-bgp4-ipv6-01
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Teaching Tips
Routers will accept more than one IPv6 address on an interface. An error is generated only if a network overlaps with another one on the router
Students may make typos and enter an erroneous address, then forget to remove it
Ask students to use the show ipv6 interface brief command frequently to check for this
Unless you need IPv4 configured on an interface, use only IPv6 in your initial examples so students clearly see what protocol is allowing traffic to move
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What IOS do I need to run IPv6? You need 12.0(21)T, or later, or 12.2(2)T or later Not all functionality is included in these releases
Example: 12.3(2)T does not support IPv6 DHCP
To find out when a command was introduced, see the Cisco IOS IPv6 Command Reference (go to). Locate the command. The listing will show when it was introduced
Also see Cisco IOS Software Release Specifics for IPv6 Features (go to)
The Packet Tracer 2620XM router does not support IPv6 unless you upgrade the IOS image
See the Activity included with this session: Upgrading IOS of Packet Tracer 2620XM router.doc
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One Interface, Several Addresses
Router#show run (part of output)ipv6 unicast-routing
interface FastEthernet0/0 ip address 192.168.0.1 255.255.255.0 duplex auto speed auto ipv6 address 2001:1:1::/64 eui-64 ipv6 address 2001:DB8:2::1/112 ipv6 address FC00:1:3::1/112 ipv6 address FC00:1:4::1/112
Example, of IPv4 address and four IPv6 addresses, in addition to link-local address (not shown)
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How well does Packet Tracer 5.1 Handle IPv6?
Packet Tracer Issues When creating a new network, if IPv6 RIP routing
does not work, save the file, close and open PT Static IPv6 assignments may not work reliably with
hosts. They may be lost when PT file is re-opened. Use stateless autoconfiguration for all router interfaces to hosts
A few issuesIf you discover one, please report it
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Tunneling Conceptual DiagramIslands of IPv6 can communicate through the more common IPv4 cloud
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Tunneling Conceptual DiagramIPv6 packet can be encapsulated in an IPv4 packet
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IPv4 / IPv6 Translation
Translates packet headers from IPv6 to IPv4 (or vice versa)
Translates the addresses in the headers from IPv6 to IPv4 (or vice versa)
Implementation is more complex than this See, for example,
http://www.ietf.org/proceedings/08nov/slides/behave-5.pdf
IPv4 Network
IPv6 Network
IP and ICMPTranslator